JP2002366514A - Method, system for generating display information and servlet engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display information generating method, a display information generation system and a servelet engine capable of contriving to efficient development. SOLUTION: The display information generating method is provided with two steps. First, a servelet to perform a prescribed processing to generate display information according to a client's request is generated. Then, HTML information in which a processing result of the servelet is incorporated is generated by a JSP 3. In the first step, it is characterized by using a web server component 1 to execute a general purpose processing in the servelet and a scenario XML 2 to specify operating conditions of the web server component 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display information generating method and a display information generating system for generating display information to be transmitted to a client in response to a request from the client. For example, it relates to a servlet control type system.

[0002]

2. Description of the Related Art With the widespread use of the Internet, web servers for providing information have become more sophisticated. In particular, in the past, a web application having dynamic contents has been used in order to realize stock price search, online shopping, and the like, instead of merely browsing a file held by a server.

Under such circumstances, conventionally, when constructing a web-based system, a CGI (Common Gatew
ay Interface) has been used. This C
In a system using the GI technology, it is necessary to start and end a program each time in response to a request from a client's web browser, which causes a deterioration in response. Therefore, in recent systems, a servlet (Servlet) system has been adopted as a format that does not cause a program to start and end each time a request is made. In this servlet-type web system, once started, usually it does not end while the system is in service.

FIG. 12 shows a general servlet type web system. As shown in the figure, the web system includes a client 101, a web server 102, an application server 103, and a database server 104. The client 101 has a web browser 1011 installed. Further, the web server 102 includes a web control program 1021, a servlet control program 10
22, a servlet 1023 and a JSP 1024. The application server 103 includes a business processing unit 1031. Further, the database server 104 includes a database 1041.

[0005] In the web system shown in FIG.
A brief description will be given of a case where there is a P request. The web server 102 receives the HTTP request and activates the servlet 1023 by the servlet control program 1022 via the web control program 1021. The servlet 1023 executes parameter processing, processing logic, and the like, and executes the JSP 102 to generate a screen.
Call 4 In JSP 1024, the display information H
Generates TML data and generates a web control program 1021
Output to When processing this servlet 1023,
External processing is called as needed. The call of the external process is transmitted to the application server 103, and the business operation unit 1031 performs a database operation.
Specifically, the operation of the database 1041 of the database server 104 is executed.

In such a web system, the servlet 1023 and the JSP 1024 need to be created for each type of processing, for example, for each screen. Also,
In the case of a large-scale system, a distributed processing method is adopted in which all processes are not embedded in the servlet 1023 and business processes are executed as a group of independent programs on another computer.

[0007]

As described above, in the case of a conventional general servlet type web system, a servlet is created for each type of processing, for example, for each screen. In addition, since the connection between the browser and the web server is disconnected each time a request is made, in order to take over data between screens, session data is generally stored on the web server using a method called session management. Had to be kept. Furthermore, when another process is called from the servlet, as in the case of the distributed processing method, it is necessary to directly write the calling sequence in the servlet, and there is a problem that development efficiency is deteriorated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and provides a display information generating method, a display information generating system, and a servlet engine which can improve development efficiency. That is.

[0009]

According to the present invention, there is provided a display information generating method for generating display information to be transmitted to a client in response to a request from the client. A first step configured as a processing program (for example, a servlet in the present embodiment) for performing a predetermined process for generating the display information in accordance with the display information (for example, And a second step of generating HTML information in the present embodiment, wherein the first step further includes a control engine (for example, the present embodiment) for executing a generalized process in the processing program. Operating condition information that specifies the operating conditions of the web server component 1) (for example, Scenario X in the facilities of the form
ML2), and a processing program configuration step of providing the generated operating condition information to the control engine to configure the processing program. Thus, since a control engine that executes generalized processing is used, display information can be efficiently generated without configuring a processing program for each display information.

Here, the control engine is connected to an external processing means (for example, the COR of the AP server 6 in the present embodiment).
BA method) (for example, parameter information in the present embodiment), and the operation condition information creating step includes a step of creating information for specifying an operation for calling the external processing means. It may be. Thereby, the parameter information for each external processing means can be managed in the control engine, so that the configuration of the processing program is made more efficient.

[0011] Further, the input information to the external processing means is obtained by using a test table in which the input information to the external processing means and the output information output from the external processing means in association with the input information are associated. And outputting the output information associated with the input information to the control engine. Thus, a test of the operating condition information of the control engine can be executed before the external processing means is created.

According to a preferred embodiment, the processing program is a servlet.

[0013] On the other hand, a display information generation system according to the present invention is a display information generation system for generating display information to be transmitted to a client in response to a request from the client. A first unit configured as a processing program for performing a predetermined process for generating information, and a second unit configured to generate display information incorporating a processing result of the processing program.
Means, and the first means includes a control engine for executing a generalized process in the processing program, and an operation condition specifying means for specifying an operation condition of the control engine. Thus, since a control engine that executes generalized processing is used, display information can be efficiently generated without configuring a processing program for each display information.

The above-mentioned control engine may have call format information of external processing means, and the operating condition specifying means may call the external processing means. Thereby, the parameter information for each external processing means can be managed in the control engine, so that the configuration of the processing program is made more efficient.

Further, when there is a test table in which input information to the external processing means is associated with output information output from the external processing means in correspondence with the input information, there is input information to the external processing means. The information processing apparatus may further include a test unit that outputs output information associated with the input information to the control engine based on the test table. Thus, a test of the operating condition information of the control engine can be executed before the external processing means is created.

According to a preferred embodiment, the processing program is a servlet.

The servlet engine according to the present invention comprises:
A servlet engine for generating display information transmitted to a client in response to a request from the client, wherein the servlet engine performs a generalized process in a processing program for performing a predetermined process for generating the display information. To do. Also, display information may be generated using this servlet engine. By using the servlet engine in this way, development can be made more efficient.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a display information generating system according to the present invention will be described with reference to the configuration diagram shown in FIG. This display information generation system is configured by a computer called a web server. The display information generation system is mainly configured by the web server component 1, and further includes a scenario XML.
2, a JSP 3, a local method 4, a unit test database 5, an AP server 6, an interface definition 7, and business session data 8. Clients that can be connected to the web server system in a communicable state via a communication network such as the Internet include:
Browser is installed. The browser is
Generate an HTTP request. The web server component 1 realizes a servlet function by cooperating with a scenario XML2 described later. In developing the web data, that is, the display information, the web server component 1 can be efficiently developed because only the scenario XML2 needs to be developed without duplicating the development.

The web server component 1 has only a general-purpose configuration among conventional servlet configurations, is a control engine, and is also called a servlet engine. Specifically, the web server component 1 includes a scenario XML manager 11, a scenario controller 12,
Method invoker 13 and session manager 14
It has.

Here, the scenario XML manager 11
Has a function of reading a scenario XML2 described later and extracting control information from the scenario XML2 and outputting it to the scenario controller 12, a function of extracting method interface information from the scenario XML2 and outputting it to the method invoker 13, , The scenario XML
2 has a function of extracting management information from the server 2 and outputting it to the session data manager 14.

The scenario controller 12 executes a scenario X
A function for inputting control information from the ML manager 11, performing a process based on the control information in response to an HTTP request from a client, and calling the JSP3 while holding the result, and a method invoker 1 in the process of the process.
3 and a function of outputting predetermined instruction information to the session data manager.

In accordance with an instruction from the scenario controller 12, the method invoker 13 executes the local method 4 and the AP server 6 based on the method interface information and the data from the session data manager 14.
It has a function to execute a method call for

The session data manager 14 has a function of inputting the business session data 8 and management information from the scenario XML manager 11 and outputting predetermined data to the method invoker 13 in accordance with an instruction of the scenario controller 12. ing.

The scenario XML2 is a form of information for specifying and controlling the operating conditions of the web server component 1, and is stored in the storage means of the web server. This scenario XML2 determines the order and contents of application processing. According to the preferred embodiment, this scenario XML2 is different for each generated display information, for example, HTML information. A process on the web server that is executed from an event such as a button press on the client (this series of processes is called a request process) is defined, and the local method 4 or the AP server 6 is defined as the process.
CORBA (Common Object Request Broker A)
(rchitecture) Describes a screen transition including a method call, a JSP3 call, and the like. In the processing, a simple control structure, for example, a processing branch by an if statement can be used.
However, only the process call is defined, and the process itself needs to be implemented in a programming language. In the scenario XML2, the definition of business session data is also described. This is because the life cycle of the data and the scope according to the business session definition are associated with the request processing. In this embodiment, the XML of the scenario XML2 is analyzed only once at the time of the first reading to the web server component 1, that is, at the timing when the first HTTP request arrives from the web browser to the servlet of the web server. Contents are retained. further,
The scenario XML2 will be described later in detail with reference to the drawings.

JSP3 implements a screen layout H
Java code (Java is a registered trademark) for editing items that are dynamically changed as a result of request processing is embedded in the display information of the TML, and is stored in the storage means of the web server. As a result of the processing by JSP3,
The content finally displayed on the client web browser is a screen generated from the HTML source. In other words, the Java code to be embedded in JSP3 is described only for generating HTML. The basic concept of JSP3 is to describe processing in a script inside an HTML file, execute the script on the server side every time a request is made from a client (browser), and replace the script part in HTML with the processing result. And send it to the browser. Thereby, the relation between the HTML file and the process can be easily understood, and dynamic contents can be created while being aware of the actual display image.

The local method 4 represents the minimum processing unit in the request processing and is stored in the storage means of the web server. It is implemented with a single Java method and defined independently of other methods. As the local method, the screen input items are checked and edited, and the IN argument of the CORBA method call is edited.
A collection of such local methods in units of screens or business units is called a local method class. This is created with an image similar to a function in C language or the like. Therefore, classes have no fields.

The unit test database 5 is used to stublessly build a unit test environment including a CORBA method call by embedding values in a table generated by a unit test tool. In the server component 1 according to this embodiment, CO
Since the RBA method is called in the scenario XML2 described above, there is no need to directly write Java code. By using this unit test tool,
By simply changing the option (property XML) of the server component 1 itself, it is possible to seamlessly shift from the unit test environment to the actual CORBA method call (business layer call, integration test, etc.) environment.

The application (AP) server 6
An ORBA object is stored. The AP server 6 uses a source code generator, which is an automatic generation tool, and uses an IDX (Interface Definition XM).
L) to Interface Definition (IDL)
inition Language) 7 is automatically created. Further, the interface definition 7 is compiled and generated as business session data.

The business session data 8 defines local data 81 and an interface definition structure 82, and is stored in the storage means of the web server. The local data 81 is a local method 4
It is passed to the interval and JSP3. The interface definition structure 82 is generated by IDL,
It is used as an argument of the P3 call. The business session data 8 is described under the belonging business session to determine the life cycle.

Next, the overall operation of the application in the web system according to the present invention will be described with reference to FIG. First, IDL using source code generator
Is generated (S201). Then, the generated IDL is compiled using an IDL compiler (S20).
2). By this compilation, the IDL stub class 71
Then, a source file of the IDL definition structure is generated.
The IDL stub class 71 is used for calling a CORBA method. The IDL definition structure is managed by the web server component 1. In the application, it is not necessary to describe a generation / deletion code.

At the time of the first HTTP request from the client (browser), the web server component 1 reads, compiles, and loads the scenario XML2 into itself (S203). And H from the client
When a TTP request has occurred (S204), the web server component 1 executes the generation of business session data according to the description of the scenario XML2 (S205). After that, the local method class 4 is called according to the application operation specified by the scenario XML2 (S206), and the AP server 6
Is called (S207), and further, JSP3 is called (S208).

When performing a unit test using the unit test database 5, necessary OUT items are acquired from the scenario XML2, and the structure is created as a test table of the database in a format determined by the web server. Next, when the property file called property XML is edited, the mode is switched to the unit test mode, and the web server application is executed, the CORBA method of the AP server is not called at the time of the CORBA method calling process, and the data is obtained from the table of the unit test database 5. It is stored in the OUT item (S209).

Here, an image of a web server application process by a screen event will be described with reference to FIG. As shown in the figure, an event occurs when the OK button in the screen displayed on the client is first clicked (S301). The web server component 1 calls the local method 4 (S302) and calls the CORBA method (S30) according to the processing flow described in the scenario XML2.
3) Call JSP3 (S304). That is, in the web server application, the processing of the screen event, the definition of the inter-screen interface data (local data), and the definition of the AP server call parameters are performed in the scenario XML2. Then, the actual process of the event is performed by a local method, and the process of generating the screen
Perform in SP3. The screen generated by JSP3 is displayed (S305).

Next, the scenario XML will be described in detail. FIG. 4 illustrates the role of the scenario XML. The scenario XML has a role of defining business session data and a role of specifying a web server application operation (also referred to as request processing).

Here, the business session data is
Web server session data, which is managed by the web server component as data linked to a specific client (browser). The business session data can manage an IDL definition structure and a local data class. Other data cannot be managed. Usually, CGI (Common Gateway)
Interface), Java Servlet, ASP (Active
Server Pages)
Session data is managed by using a cookie or by using an application-specific API. In the web server, the web component executes life cycle (generation / destruction) management and database management by defining the scenario XML.

The web server application operation is a group of web server application processes when an HTTP request is issued from a client (browser). Web server application processing according to the embodiment of the present invention refers to local method invocation processing, CORBA communication processing, and JSP invocation processing.

Further, a sample code of the scenario XML will be described with reference to FIG. Scenario XML is
Begins with the application tag. Next, create a business session using session tag. A business session is a unit for managing the life cycle of business session data, and is defined by a session tag of scenario XML.

Under the session tag, a plurality of business session data definitions (field tags) and web server application operations (request tags) can be described. Under the request tag, local method call processing (invoke-met
hod type = local), CORBA method call processing (inv
oke-method type = iiop), JSP call processing (open-pag
e) can be described. All web server application processes have parameters (param tags).

The id attribute of a field tag can be designated as a parameter, and this designation method is called a field path. The business session data is an interface IN structure (field type = iiop input = in)
And the interface OUT structure (field type = iiop
input = out) and local data (field type = local)
Can be defined. The business session data is
It can be defined under the application tag in addition to under the ssion tag. This data is treated as global data commonly used in the web server application.

Next, the business session data will be described in detail with reference to the drawings. FIG. 6 is a diagram showing a list of business session data. Business session data
This is data that is temporarily used in a unit in which an arbitrary client (browser) is running, and is data that can be used even when an HTTP session ends. Where HT
The TP session means a period from when an HTTP request is generated from a client, a process of a web server is performed, and a response is returned to the client. The business session data is managed by the web server component, and is defined by a field tag of the scenario XML.

As shown in FIG. 6, the IN and OUT items and the local data of the CORBA method defined by the IDL definition structure can be defined as business session data. This business session data is generated immediately before an HTTP request is generated from the client and the request tag is called. At this time, r indicated by the placeID of the HTTP request
The field tag defined in the session tag to which the equest tag belongs, and all the field tags and ap defined in the higher-level session tag
Business session data is generated for the class defined by the field tag defined immediately below the plication tag. Here, the placeID is an identifier defined in the HTTP parameter, and is an essential HTTP parameter in JSP. The web server analyzes this placeID and calls the appropriate request tag.

The web server application process can be specified by a parameter (param tag). The parameter can be a field path. The business session data that can be specified is only the business session to be generated. In other words, business session data defined in a business session other than the current business session and its higher-level business session cannot be specified.

The generated business session is HTTP
It is secured by the web server even after the session ends. When the next HTTP request occurs, placeI
The business session data already generated by D is kept as it is, but the other data is deleted from the web server.

Next, the relationship between the scenario XML and the business session data will be described with reference to FIG. For example, if placeID is "/ sessionA / sessionB / requestB1", the generated business session data, or
Business session data that can be specified in the param tag of the application process under the request tag is dataB1, data
A1 and dataG1. dataC1 is a separate business session and cannot be referenced. Also, if the placeID is "/ sessionA / ses
After the HTTP request of "sionB / requestB1" is completed, the placeID is "/ sessionA / sessionC / requestC1"
When a TTP request occurs, dataA1 and dataG1 are kept as they were in the previous HTTP request.
taB1 is deleted from the web server.

Next, a scenario X will be described with reference to FIGS.
The ML test will be described. In the embodiment of the present invention, a test is performed by creating a unit test database without developing a CORBA stub. Normally, if an invoke-method (type = iiop) tag is described in the scenario XML, the CORBA object of the AP server will be called. However, by rewriting PropertyXML, J
DBC (Java Database Connectivity)-ODBC (Op
en Database Connectivity) Connect using a bridge. After the connection, the data of the table is obtained and stored in the OUT item. This makes it possible to perform substantially the same processing as connecting to the AP server.

The process flow of the unit test will be described with reference to FIG. First, the developer sets the ODBC. Then, a table is created using an automatic table generation tool provided by the web server. In this example, the name of the table automatic generation tool is DBTableCreater. This tool is made by a command line program. The table automatic generation tool checks the scenario XML and OUT items, obtains necessary OUT item information, and creates a unit test database table (S801). Then, data of the unit test database is created using a predetermined application program (S802). The predetermined application program is, for example, “Access” (a trademark of Microsoft)
It is.

Start the client (browser). When the client makes an HTTP request to the web server, the client data is stored as an IN item in some form (S803). Scenario XM
When L performs the process of invoke-method (type = iiop),
The data of the N items is ignored, and the data of the OUT items is obtained from the unit test database (S804).

The OUT item has some form of JSP (HTM
L), which is transmitted to the client and displayed on the screen (S805). Since the IN item and the OUT item are defined as business session data, they can be browsed by the business session viewer (S806).

Next, the table configuration of the unit test database will be described with reference to FIG. FIG. 9 shows scenario X
FIG. 3 is a correspondence diagram of ML, OUT items and a table configuration. When the scenario XML invoke-method (type = iiop) processes, the web server component
When the item is T, the next table is searched. ObjectClassName # methodName # OutFiedid

Here, ObjectClassName is an IDL stub name, and a class name excluding the package name of the class attribute of the ivoke-method tag must be specified. Also, methodName is the method name, and invoke-method
Is the name specified in the method attribute of OutFiedid is i
This is the id defined in the param tag under nvoke-method.
However, specify the id attribute specified in the field tag.

In the case of the scenario XML shown in FIG.
The web server component searches for a table called "rolObj # func # outData". The column name of the table is OUT
Must correspond to the member name of the item. If the member type is a primitive type or java.lang.String, the column data is substituted for the member as is. If the member type is a nested class or array, the developer enters the data to look for a different table with the following instruction rules: table (tableName) tableName: Name of table to link

In the case of FIG. 9, the members of class A are class B
Members are nested. In this case, "table (Cont
rolObject # func # outData # e1) "to create a nested structure in another table. In the case of FIG. 9, since a table automatic generation tool is used, a nested structure is created in accordance with the table rules, but this allows the developer to freely determine the table name. Only the top class of the OUT item has a fixed table naming rule.

In this embodiment, the column must have a column name of "acipid". The web server component sorts "acpid" in ascending order and assigns it to the array in that order to determine the order of the array structure. Even if it is not a sequence structure, acipid must be present. In this case, the data of the row with the smallest acipid value is substituted. The table automatic generation tool according to the embodiment of the present invention is an auto number type ac
Make ipid.

Next, an actual example of the scenario XML is shown in FIG. The scenario XML shown in FIG. 10 specifies processing when a fund list is selected in the menu. Specifically, it describes the process of initializing the instance variable of the exception Bean, the process of initializing the instance variable of the business bean, the process of calling the CORBA method for obtaining the fund list, and the process of displaying the fund list screen. .

FIG. 11 is a conceptual diagram of a hardware configuration of a web server or a client computer capable of realizing the present invention. The web server or the like includes a central processing unit (CPU) 111 and a memory 114. C
The PU 111 and the memory 114 are connected via a bus 112 or the like.
Hard disk device 1113, 1 as auxiliary storage device
131 is connected. Flexible disk drive (or MO1128, CD-ROM 1126, 112
9 medium drive devices 1126, 1128, 1129, 1
130) 1120 are connected to the bus 112 via a flexible disk controller (or various controllers such as an IDE controller 1125 and a SCSI controller 1127) 1119.

A flexible disk device (or MO,
Medium drive device 1126, 1128, 1 such as CD-ROM
129, 1130) 1120, a flexible disk (or a medium such as an MO or a CD-ROM) is inserted.
This flexible disk or hard disk device 11
13. A storage medium such as a ROM 1114 can cooperate with an operating system to give instructions to a CPU or the like, record computer program codes for implementing the present invention, and be loaded into the memory 114. It is performed by: The code of the computer program can be compressed or divided into a plurality of parts and recorded over a plurality of media.

The web server or the like may be a system further provided with user interface hardware. As the user interface hardware, for example, a pointing device (for inputting screen position information) may be used. Mouse, joystick, trackball, etc.) 117, a keyboard 116 that supports key input, and displays 1111 and 1112 for presenting image data to the user. The speaker 1123 receives an audio signal from the audio controller 21 via the amplifier 1122 and outputs the audio signal as audio.

The web server or the like includes a serial port 15 and a modem or a communication adapter 1 such as a token ring.
Communication with another computer or the like can be performed via the communication unit 118 or the like. The present invention can be implemented by an ordinary personal computer (PC) or a workstation. However, these components are merely examples, and not all the components are essential components of the present invention. In particular, components such as the audio controller 1121, the amplifier 1122, and the speaker 1123 are not essential in one embodiment of the present invention.

As the operating system of the web server and the client computer, Windows
wsNT (a trademark of Microsoft), Windows2
000 (a trademark of Microsoft), Windows 3.
x (trademark of Microsoft), OS / 2 (trademark of IBM), MacOS (trademark of Apple), Linux
(Trademark of Linus Torvlds), AIX (IB
M-Trademark, X-WINDOW system (Trademark of MIT), etc. that support GUI multi-window environment as standard, PC-DOS (Trademark of IBM), MS
-Characters such as DOS (Microsoft trademark)
Base environment, OS / Open (trademark of IBM), VxWorks (Wind River Sys)
tems, Inc. Real-time OS such as trademark of J), J
It can also be realized by an OS embedded in a network computer such as avaOS, etc.
It is not limited to the system environment. In the above example, a servlet is used as an example of the processing program. However, the present invention is not limited to this, and another program may be used.

In the above-described example, various programs installed in a hard disk such as a web server, storage means such as a memory, etc. can be stored in various types of storage media, and via a communication medium. Can be communicated. Here, in the storage medium, for example,
Includes flexible disks, hard disks, magnetic disks, magneto-optical disks, CD-ROMs, DVDs, ROM cartridges, battery-backed RAM memory cartridges, flash memory cartridges, nonvolatile RAM cartridges, and the like. Further, the communication medium includes a wired communication medium such as a telephone line, a wireless communication medium such as a microwave line, and the like, and also includes the Internet.

[0061]

According to the present invention, it is possible to provide a display information generating method, a display information generating system, and a method of constructing a servlet engine capable of improving development efficiency.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a web system according to the present invention.

FIG. 2 is a diagram showing a processing flow in the web system according to the present invention.

FIG. 3 is a diagram showing a processing image of a web system according to the present invention.

FIG. 4 is a diagram for explaining the role of scenario XML according to the present invention.

FIG. 5 is a diagram showing a description example of a scenario XML according to the present invention.

FIG. 6 is a diagram showing a list of business session data according to the present invention.

FIG. 7 is a diagram showing a relationship between scenario XML and business session data according to the present invention.

FIG. 8 is a diagram showing a processing flow of a unit test in the present invention.

FIG. 9 is a diagram showing a relationship between an OUT structure and a table according to the present invention.

FIG. 10 is a diagram showing a specific example of scenario XML in the present invention.

FIG. 11 is a diagram showing an example of a hardware configuration for realizing a web server or the like according to the present invention.

FIG. 12 is a diagram showing a configuration example of a conventional web system.

[Explanation of symbols]

1 Web server component 2 Scenario XML
3 JSP 4 local method 5 unit test database
6 AP server 7 Interface definition 8 Business session data

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Claims (10)

[Claims] 1. A display information generating method for generating display information to be transmitted to a client in response to a request from the client, comprising: a predetermined process for generating the display information in response to a request from the client. And a second step of generating display information in which the processing result of the processing program is incorporated. The first step further includes a generalization of the processing program. Operating condition information creating step for creating operating condition information for specifying operating conditions of a control engine that executes the generated processing, and a processing program configuration configured as the processing program by giving the created operating condition information to the control engine And a display information generating method. 2. The method according to claim 1, wherein the control engine has call format information of external processing means, and the operation condition information creating step has a step of creating information for specifying an operation for calling the external processing means. The display information generating method according to claim 1, wherein 3. Using a test table in which input information to the external processing means is associated with output information output from the external processing means in correspondence with the input information, the input information to the external processing means is determined. 3. The display information generating method according to claim 1, further comprising a step of outputting output information associated with the input information to the control engine when the input information is generated. 4. The display information generating method according to claim 1, wherein the processing program is a servlet. 5. A display information generating system for generating display information to be transmitted to a client in response to a request from the client, the display information generating system comprising: a predetermined process for generating the display information in response to a request from the client And a second means for generating display information in which the processing result of the processing program is incorporated, wherein the first means is generalized in the processing program. A display information generation system, comprising: a control engine that executes processing; and an operation condition specifying unit that specifies an operation condition of the control engine. 6. The display information generating system according to claim 5, wherein said control engine has call format information of external processing means, and said operating condition specifying means calls said external processing means. . 7. A test table in which input information to said external processing means is associated with output information output from said external processing means in correspondence with said input information, and there is input information to said external processing means. 7. The display information generation system according to claim 5, further comprising: a test unit that outputs output information associated with the input information to the control engine based on the test table. 8. The display information generating system according to claim 5, wherein said processing program is a servlet. 9. A servlet engine for generating display information to be transmitted to a client in response to a request from the client, wherein the servlet engine is a general-purpose servlet engine for performing a predetermined process for generating the display information. A servlet engine that executes the generalized processing. 10. A display information generating method, wherein the display information is generated by using the servlet engine according to claim 9.